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Wyświetlanie 1-4 z 4
Tytuł:
Numerical studies of fluid flow in flat, narrow-gap channels simulating plate heat exchanger
Autorzy:
Piepiórka-Stepuk, J.
Jakubowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/185176.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
PHE
CFD
cleaning in CIP system
PWC
czyszczenie w systemie CIP
Opis:
The aim of this work was to present the numerical simulation results determining the distributions of flow velocity and pressure in the individual channels of a plate heat exchanger. The simulations have been conducted by means of the Finite Volume Method (FVM) of numerical computation using the ANSYS CFX software. The computational model constituted spaces between 10 flat, straight flow type plates of the heat exchanger. The obtained results of numerical simulations confirm the presence of inhomogeneous flow conditions in the neighbouring channels between the plates. The computations enabled to point out the regions on the plates, in which insufficient flow can result in problems with their cleaning. The results of this work constitute the first part of a research leading to an assessment of cleaning conditions in plate heat exchangers.
Źródło:
Chemical and Process Engineering; 2013, 34, 4; 507-514
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computational analysis of displacement of particles with given size on the nonstationary bulging membrane as a theoretical model of membrane fouling
Autorzy:
Gac, J.M.
Gradoń, L.
Powiązania:
https://bibliotekanauki.pl/articles/185471.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
membrane
fouling
membrane cleaning
numerical modeling
membrana
zanieczyszczenia
czyszczenie membrany
modelowanie numeryczne
Opis:
A simple model of behaviour of a single particle on the bulging membrane was presented. As a result of numerical solution of a motion equation the influence of the amplitude and frequency of bulging as well as the particle size on particle behaviour, especially its downstream velocity was investigated. It was found that the bulging of a membrane may increase the mean velocity of a particle or reinforce its diffusive behaviour, dependeing on the permeation velocity. The obtained results may help to design new production methods of highly fouling-resistant membranes.
Źródło:
Chemical and Process Engineering; 2013, 34, 1; 109-119
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Parameters of Cleaning a CIP System Affected Energy Consumption and Cleaning Efficiency of the Plate Heat Exchanger
Autorzy:
Piepiórka-Stepuk, J.
Diakun, J.
Jakubowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/185066.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cleaning
CIP system
energy consumption
cleaning parameters
cleanliness
cleaning efficiency
czyszczenie
System CIP
zużycie energii
parametry czyszczenia
czystość
Opis:
This paper presents a study on the effect of cleaning factors on the energy consumption of the cleaning process in a CIP system, and the correlation between single components of electricity necessary to perform this process and the cleanliness degree obtained. Studies were carried out in a laboratory cleaning station, wherein a plate heat exchanger contaminated with hot milk was included. The research program was developed according to a 5-level statistical plan. Based on the results, obtained with Experiment Planner 1.0, a regression function of energy requirement considering variables such as: cleaning time, temperature and flow rate of the cleaning liquid via the cleaned exchanger has been developed. Describing this relationship, linear and quadratic functions with double interactions were used. Significance level for the analysis was established at α = 0.05. Correlation analysis between components of the electricity necessary to perform the cleaning process (pump drive and heating of the cleaning agent) and the resulting degree of cleaning of heat exchanger plates was performed.
Źródło:
Chemical and Process Engineering; 2017, 38, 1; 111-120
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of capillary pumping on the course of cleaning porous materials containing liquid contaminants using supercritical fluids – A pore network study
Autorzy:
Krzysztoforski, Jan
Khayrat, Karim
Henczka, Marek
Jenny, Patrick
Powiązania:
https://bibliotekanauki.pl/articles/2086809.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
porous material
supercritical fluid
mathematical modelling
cleaning
capillary pumping
materiał porowaty
płyn nadkrytyczny
modelowanie matematyczne
czyszczenie
pompowanie kapilarne
Opis:
The role of capillary pumping on the course of cleaning porous materials containing liquid contaminants using supercritical fluids was investigated numerically. As a specific process to be modelled, cleaning of porous membranes, contaminated with soybean oil, using supercritical carbon dioxide as the cleaning fluid (solvent) was considered. A 3D pore-network model, developed as an extension of a 2D drying model, was used for performing pore scale simulations. The influence of various process parameters, including the coordination number of the pore network, the computational domain size, and the external flow mass transfer resistance, on the strength of the capillary pumping effect was investigated. The capillary pumping effect increases with increasing domain size and decreasing external flow mass transfer resistance. For low coordination numbers of the pore network, the capillary pumping effect is not noticeable at macro scale, while for high coordination numbers, the opposite trend is observed – capillary pumping may influence the process at macro scale. In the investigated system, the coordination number of the pore network seems to be low, as no capillary pumping effects were observed at macro scale during experimental investigation and macro-scale modelling of the membrane cleaning process.
Źródło:
Chemical and Process Engineering; 2021, 42, 4; 349--368
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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